Buendia, G. & Cordero, F. (2013). The use of graphs in specific situations of the initial conditions of linear differential equations. International Journal of Mathematical Education in Science and Techno-logy, 44(6), 927-937.

Dana-Picard, T., & Kidron, I. (2007). Exploring the phase space of a system of differential equations: different mathematical registers. International Journal of Science and Mathematics Education, 6(4), 695–717.

Habre, S. (2003). Investigating students’ approval of a geometric approach to differential equations and their solutions. The International Journal of Mathematical Education in Science and Technology, 34(5), 651-662.

Raychaudhuri, D. (2008). Dynamics of a definition: a framework to analyse student construction of the concept of solution to a differential equation. International Journal of Mathematical Education in Sci-ence and Technology, 39(2), 161–177.

Raychaudhuri, D. (2014). Adaptation and extension of the framework of reducing abstraction in the case of differential equations. International Journal of Mathematical Education in Science and Techno-logy, 45(1), 35-57.